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Changes in soil organic matter with cropping as measured by organic carbon fractions and 13C natural isotope abundance (1993)

Lefroy, Rod D. B. ; Blair, Graeme J. ; Strong, Wayne M.

Springer

Plant and soil 155-156 (1993), S. 399-402

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ISSN: 1573-5036

Keywords: carbon-13 ; cropping systems ; δ13C ; KMnO4 oxidation ; soil organic matter

Source: Springer Online Journal Archives 1860-2000

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Abstract The decline in soil organic matter with cropping is a major factor affecting the sustainability of cropping systems. Changes in total C levels are relativelyinsensitive as a sustainability measure. Oxidation with different strength KMnO4 has been shown to be a more sensitive indicator of change. The relative size of soil C fractions oxidised by 333 mM KMnO4 declined with cropping, whilst the relative size of the unoxidised fraction increased. Changes in δ13C ratio have been used to measure C turnover in systems which include C3 and C4 species.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00025067

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